Heel-spttb to prevent slipping on ice



CIO

HORA'IIO POLLARD, OF BOSTON, MASSACHUSETTS.

HEEL-SPUR TO PREVENT SLIPPING ON ICE.

Specification of Letters Patent No. 19,205, dated January 26, 1858.

To all whom it may concern Be it known that I, HoRATIo POLLARD, ofBoston, in the county of Suffolk and State of Massachusetts, haveinvented a new and useful Heel-Spur to Prevent Slipping on Ice, &c., andthat the following description, taken in connection with theaccompanying drawings, hereinafter referred to, forms a full and exactspecication of the same, wherein I have set forth the nature andprinciples of my said invention, by which it may be distinguished fromothers of a similar class, together with such parts as I claim anddesire to have secured to me by Letters Patents.

The figures of the accompanying pla te of drawings representmyimprovements.

Figure l is a central vertical section on an enlarged scale, showing theheel spur inserted in the heel of a boot or shoe. Fig. 2 is a similarview with the spur projecting. Fig. 3 is a view of the screw socket inwhich the spur is held.

The object of the present invention is to provide a spur to be insertedin the heels of boots and shoes to prevent the liability of personsslipping uponice &c., and so constructed as to either project from thebottom of the heel or be drawn up into the same as may be desirable.This result I accomplish by first permanently inserting in the heel ametallic socket, fastened therein by means of a screw thread cut on itsouter surface or in any other proper manner, and having a female threadcut in its inner circumference. A sharpened spur or stud with thread ofthe socket, can by turning it with a suitable key, be screwed up or downin the socket, so that its point will either project any desireddistance from the heel or made flush with the bottom surface of thesame, when not in use.

a, a in the drawings represent a stud or spur with a sharpened point andhaving a male screw thread cut on its outer surface.

Z) Z) is a socketfastened into the heel c c by a screw thread Z andhaving a female screw thread in its inner circumference into which themale screw of the spur a a fits as shown in the drawings.

It will thus be seen that by turning the spur a a by means of a key orotherwise, it can be moved up into the heel as seen in Fig. l or made toproject therefrom as tages of which arrangement in a device of this kindwill readily be apparent.

Having thus described my improvements` I shall state my claim asfollows.

IVhat I claim as my invention and desire to have secured to me byLetters Patent, 1s-

The combination of the screw socket and screw stud or spur as. describedand for the purpose specified.

HORATIO POLLARD.

IVitnesses JOSEPH GARRETT, ALBERT W'. BROWN.

a male thread corresponding to the female i shown in F ig. Q, atpleasure, the advan-

